Does the 642 still make sense? Thoughts?
Yes.
However,
everything about lawfully carrying a handgun for self defense is a compromise. The trick is to balance the compromise as much to your advantage as is humanly possible, for the most probable circumstances anticipated as possible.
The principle of TANSTAAFL applies. (For anyone who didn't grow up as a fan of Heinlein, that means
There Ain't No Such Thing As A Free Lunch.
I started out as a young cop carrying a service revolver, and that included me picking up some steel 5-shot snubs in those early LE years. My later dalliance with compact and subcompact pistols caused me to put the snubs into the safe for a while. Then, one day I ordered my first Airweight, an early 642-1, when I read that it was rated for a steady diet of +P.
Naturally, I had to dust off and practice my DA revolver skills, and the fact that the Airweight was lighter than my steel J's added some spice to the mix when shooting +P. I invested a lot of range work in it, though, and at the same time working to master the lighter J added some polish to my other shooting. After several cases of ammunition and a fair amount of trigger time (while serving as one of our instructors), my DA revolver skills felt refreshed and even improved.
Nowadays, I have a couple 642-1's
and a couple M&P 340's
and a 37DAO Airweight. My steel J's once again tend to spend more time in the safe.
Now, while I'd only delegate a J-frame to the role of being a Secondary weapon if I were still working either in uniform or as a detective, or a go-to-meeting or court weapon in plainclothes ... I'd still pocket-holster one off-duty . That said, the J-frame remains a primary retirement CCW choice. Why? I have much more control over the places I go and where my activities take me. I still employ the risk assessment skills I learned and developed over the decades I had a badge.
Nowadays, I don't care to hang a larger or heavier weapon on my hip all the time. Sometimes, sure, but not nearly as often. That's why I kept all of my 9's, .40's, .45's and some mid-sized .357MAG's.
One of 642's or M&P 340's typically gets the nod. For a situation where even one of them is a bit chunky or too large? I have a couple of LCP's. Yes, those took some trigger time on the range to acclimate to running them, too. They can slip into some pockets (holstered) which are either too tight or too short to easily conceal one of my J's, though.